Mode standalone: when using z/x/y urls, either accept z= or zoom=
DB/Osmosis: remove profiling -> has been moved to main loop
DB/Osmosis: debug add_column queries (e.g. for near conditions)
DB/Osmosis: support for hide_outer_ways column (osmosis-multipolygon v0.3)
Doc: checklist for version upgrade
Bump to version 0.9.2
Merge branch 'master' into branch-0.10

Conflicts:
	doc/database.md
	pgmapcss/db/osmosis/db_functions.py
	pgmapcss/version.py
DOC: Remove install instructions for Ubuntu 12.04
DOC: Fix install instructions for Ubuntu 14.04/Mapnik 3.0

- add missing "apt-get update"
- command line for compiling needs to include 'mapnik-3.0'
DOC: adhere database type in install instructions
DOC: shorten file names of install instructions
DB/osm2pgsql: optimize queries only when object relation[type=route]
DB/osm2pgsql: add __TYPE_SHORT__ and __TYPE_MODIFY__ replacement patterns
DB/osm2pgsql: bugfix objects_member_of: tags may be None
DB/osm2pgsql: objects_member_of: bugfix resolving way->node relations
DB/osm2pgsql: parent relations for relation(polygon)->member, way->node
Main loop: bugfix postgis 2.0: add ST_ prefixes
Merge branch 'branch-0.10' into db-osm2pgsql-relationship
DB/osm2pgsql: document optimized parental queries